
@book{RobertCook1989,
  author = {Robert D. Cook and David S. Malkus and Michael E. Plesha},
  title = {Concepts and Applications of Finite Element Analysis},
  year = {1989},
  edition = {Third Edition},
  isbn = {0-471-84788-7}
}

@book{BittnarSejnoha1996,
  author = {Z. Bittnar and J. Sejnoha},
  title = {Numerical Methods in Structural Mechanics},
  year = {1996},
  publisher = 	 {Thomas Telford},
  isbn = {978-0784401705}
}

@article {RagnarLarsson2011,
  author = {Ragnar Larsson and Jesus Mediavilla and Martin Fagerström},
  title = {Dynamic fracture modeling in shell structures based on XFEM},
  journal = {International Journal for Numerical Methods in Engineering},
  volume = {86},
  number = {4-5},
  publisher = {John Wiley & Sons, Ltd.},
  issn = {1097-0207},
  url = {http://dx.doi.org/10.1002/nme.3086},
  doi = {10.1002/nme.3086},
  pages = {499--527},
  keywords = {shell theory, higher order thickness strain, cohesive zones, dynamic fracture,   discontinuous XFEM kinematics},
  year = {2011},
}